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SubjectRe: [2.6.16 PATCH] Filessytem Events Reporter V2
Evgeniy Polyakov 写道:
> On Fri, Apr 07, 2006 at 06:03:04PM +0800, Yi Yang (yang.y.yi@gmail.com) wrote:
>
>>>> Can you explain why there is such a big difference between
>>>> netlink_unicast and netlink_broadcast?
>>>>
>>>>
>>> Netlink broadcast clones skbs, while unicasting requires the whole new
>>> one.
>>>
>>>
>> No, I also use clone to send skb, so they should have the same overhead.
>>
>
> I missed that.
> After rereading fsevent_send_to_process() I do not see how original skb
> is freed though.
>
I'm considering how to free it, because cloned skbs share data with
original skb, so this case is special,
I try to clarify the logic of kfree_skb.
>
>>>>> Btw, you need some rebalancing of the per-cpu queues, probably in
>>>>> keventd, since CPUs can go offline and your messages will stuck foreve
>>>>> there.
>>>>>
>>>>>
>>>>>
>>>> Does keventd not do it? if so, keventd should be modified.
>>>>
>>>>
>>> How does keventd know about your own structures?
>>> You have an per-cpu object, but your keventd function gets object
>>>
>> >from running cpu, not from any other cpus.
>>
>
>

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